1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // UNSUPPORTED: c++98, c++03, c++11 11 12 // <propagate_const> 13 14 // template <class T> struct hash<experimental::fundamentals_v2::propagate_const<T>>; 15 16 #include <experimental/propagate_const> 17 #include "propagate_const_helpers.h" 18 #include <cassert> 19 20 using std::experimental::propagate_const; 21 22 namespace std { 23 template <> struct hash<X> 24 { 25 typedef X first_argument_type; 26 27 size_t operator()(const first_argument_type&) const 28 { 29 return 99; 30 } 31 32 }; 33 } // namespace std 34 35 int main() { 36 37 typedef propagate_const<X> P; 38 39 P p(1); 40 41 auto h = std::hash<P>(); 42 43 assert(h(p)==99); 44 } 45
